Test cook Julia Collin Davison uncovers the secrets to cooking with a slow cooker. First, she teaches host Christopher Kimball how to make the ultimate Old-Fashioned Chicken Noodle Soup. Next, she reveals the test kitchen's secrets for foolproof Pork Loin with Cranberries and Orange. Then, she makes the perfect Chocolate-Hazelnut Bread Pudding. And finally, gadget guru Lisa McManus discusses how to buy a slow cooker and how to know the temperature of your slow cooker.